Textile warping devices

ABSTRACT

The invention relates to textile warping devices for winding yarns on to warp beams, suitable for use on weaving looms or on dyeing equipment in which the warp beam is driven by means of flexible drive means such as V-belts of rubber or the like, and in which the necessary movements are imparted to the mechanism exclusively by means of pneumatic devices which may be used for causing engagement of slide head members with the warp beam, the control of a presser roller, the control of a braking means and the operation of a comb. A warp beam may be fitted into the warping device by causing it to run up a ramp to bring spindles on the warp beam nearly into alignment with apertures in the slide head members which are then moved towards one another giving a slight further lift to the warp beam and bringing it clear of the ramps.

United States Patent [151 3,667,09 1 Leger June 6, 1972 [54] TEXTILE WARPING DEVICES Primary Examiner-Louis K. Rimrodt [72] Inventor: Robert Leger, Tourcoing, France Aimmey Emcst Montague [73] Assignee: Societe Anonyme Dite Etablissements Cor- TRA T Tourcomg France The invention relates to textile warping devices for winding [22] Filed: Apr. 29, 1970 yarns on to warp beams, suitable for use on weaving looms or on dyeing equipment in which the warp beam is driven by means of flexible drive means such as V-belts of rubber or the like, and in which the necessary movements are imparted to the mechanism exclusively by means of pneumatic devices which may be used for causing engagement of slide head members with the warp beam, the control of a presser roller. the control of a braking means and the operation of a comb. A warp beam may be fitted into the warping device by causing it to run up a ramp to bring spindles on the warp beam nearly into alignment with apertures in the slide head members which are then moved towards one another giving a slight further lift to the warp beam and bringing it clear of the ramps.

9 Claims, 8 Drawing Figures [52] US. Cl ..28/32 [5|] Int. Cl. D02h 5/00 [58] Field of Search 28/32, 35

[56] References Cited UNITED STATES PATENTS 3,l92,743 7/1965 Kohl 1.28/32 X 3,461,5l8 8/1969 Stelwagen et al. ..28/32 PATENTEUJUR 61972 SHEET 10F 3 m v 4 r w v INVENTOR ROBERT LEGER ATTORNEY PATENTEBJUN 61972 3,667. 091

sum 20F 3 INVENTOR BY ROBERT LEGER ATTORNEY PATENTEDJUH 6 I972 SHEET 3 BF 3 INVENTOR ROBERT LEGER BY ATTORNEY.

TEXTILE WARPIN G DEVICES The present invention relates to improvements in textile warping devices for winding warp beams for use on following machines such as stretching machines or looms.

Warping mechanisms have been known for a long time and the state of the art in question may be illustrated by French Pat. No. 1,291,727 dated Mar. 13, 1961 in the name of Golfetto relating to Improvements in warp beams." It is also illustrated by French Pat. No. 1,382,775 dated Feb. 18, 1964 in the name of Maschinenfabrik Benninger A.G.

The former is concerned with means for driving the warp beam by means of rolls, while the latter relates essentially to a braking device for the beam and the presser roller.

It is important in a warping device that a rapid and efficient braking can be obtained up to the slippage limit of the material wound on the beam. It is also important to ensure that the presser roller does not press against the warp yarns during the braking and damage them. Most of these hydraulic braking devices at present in use have the disadvantage of producing oil leakages which may result in oil spots on the yarn being handled. Moreover most of these warping devices comprise noisy gears which result in a coarse action of the machine. The operation of the comb is often incorrect by reason of which it does not distribute the yarn correctly over the beam, the yarn giving a sinuous efi'ect leading to poor filling of the beam.

A further serious defect lies in the method of coupling the beam to the drive heads of the warping device. It is usual to encounter different types of warp beam when weaving one piece of fabric, which require intermediate connecting members between the flanged end of the beam and the drive heads of the warping device. The insertion and removal of these members leads to loss of time on insertion and withdrawal of the warp beam from the warping device. Moreover these operations require the use of lifting and adjustable holding means for the warping device which also results in loss of time.

The present invention is intended to avoid these disadvantages.

The warping device according to the invention is characterized mainly by flexible and resilient operating means, such as rubber V-belts in the transmission path while avoiding gear wheels and by the use of pneumatic actuators for connection of the warp beam with the control heads, the operation of the presser roller, the operation of the brake and the means for movement of the comb.

Morespecifically the control heads for the warp beam are movable in the direction of the axis of the beam and have means for centering the beam, andin each case a friction plate which comes into contact with an intermediate disc fixed to the warp beam, the movement of the heads ensuring an axial clamping of the beam so that the friction of the discs is sufficient for the driving and braking of the warp beam by the heads.

Likewise the presser roller which normally presses on the Y yarn which is being wound on the beam is arranged so that its movement of approach to and removal from the beam is controlled by a pneumatic actuator which enables it to take a position in contact with the yarn with an adjustable force and a position removed from the yarn, this latter position being taken instantaneously on braking of the warp beam.

It is convenient to effect the movement of the comb by pneumatic means with an adjustable stroke and an alternating movement at a speed which varies little in the course of its movement.

According to a preferred construction the means for centering the warp beam are located by combination of a lift slope or ramp provided with abutments on which the flanges of the warp beam can run, with the spindle ends having a conical end part adapted to be introduced into cor-responding axial holes, with a conical entry portion, in the head spindles so that the approach to them has the efiect of introducing the projecting spindles giving a slight lift to the warp beam away from the lift slope by the effect of the conical ends.

On the other hand the intermediate discs have pegs extending along axes parallel to that of the warp beam which are introduced into apertures in the flanges thereof when a central hole is threaded on to the spindles of the warp beam, the said discs having on the face opposite to the pegs means which come into engagement with friction surfaces of drive plates on the control heads when the latter are clamped laterally against the warp beam. 1

The following description relates to a nonlimiting example of the warping device fomiing the object of the invention which is illustrated on the accompanying drawing, and in which:

FIG. 1 is an elevation of the warping device,

FIG. 2 is a diagrammatic partial view showing the profile of one head, with the warp beam,

FIG. 3 is a partial view of one head and of a warp beam,

FIG. 4 is a diagrammatic partial view, separated, of a warp beam, an intermediate disc and a friction plate for head,

FIG. 5 is a view in diagrammatic plan of the driving mechanism for the warping device,

FIG. 6 is a paru'al profile view of a warp beam,

FIG. 7 is a diagrammatic profile view of a warp beam, a presser roller and control mechanism, and

FIG. 8 is a diagrammatic view showing the control of the comb.

The warping device shown consists essentially of two heads I and 2 connected primarily by two cross members 3 and 4 of cylindrical shape on which slide head members 5 and 6 for driving a warp beam 7 having two endplates 8 and 9.

The cross member 3 serves also as a pivot axis for arms such as 10 which support a presser roller 11. The arms 10 are caused to execute a pivot movement around the member 3 by means of a pneumatic cylinder piston device 12 controlled by a regulating valve 13 supplied with compressed air through a pipe 14 the pressure of which is adjusted by means of a pressure regulator 15. By varying the air pressure produced by the regulator 15 the pressure exerted by the presser roller 11 on the yarns on the warp beam can be varied. The roller is held constantly in engagement with the surface of the yarns on the beam, or it may be moved away completely so as to produce soft beams intended for dyeing, or again it may be removed from the yarn surface precisely at the moment at which the beam is subjected to a braking action and returns into engage ment with the yarn surface at the moment when the warping device is started again. This latter operation is performed by means of a suitable distributor valve operated at the same time as the brake. The line of warp yarns passes over a measuring roller 17 connected to a tachometer generator before being wound on to the warp beam 7 and after having been caused to pass through a comb 19 as is usual on warping devices. This comb may receive a reciprocatory zig-zag motion. The comb 19 is mounted on a support 20 receiving an oscillatory movement by means of a connecting rod 21 fixed at one end to a crank pin 22 secured in a groove 23 in a disc 24 which receives an oscillatory movement by means of an arm 25 the end of which is pivotally connected to a pneumatic piston cylinder device 26 controlled by a valve 27 operated by contact members 28 and 29 at the ends of the movement of the disc 24. The contact members 28 and 29 are engaged by means of adjuster screws 30, 31 fitted to the ends of projecting arms 32, 33 on the disc 24.

The control valve 27 receives compressed air through a pipe 34, and spent air flows out through the pipe 35. With this arrangement the device 26 is operated first in one direction rotating the disc 24 in the counter clockwise direction of FIG. 8, pulling the connecting rod 21 and the comb 27 towardsthe left. As the arm 32 engages the contact member 28 the piston cylinder device 26 is reversed and the disc 24 turns in the clockwise direction, connecting rod 21 pushes the comb 19 to the left until the screw 31 on the arm 33 engages the contact member 29 which produces a further movement of the piston cylinder 26 and the cycle recommences. Thus the comb 19 receives a reciprocatory motion having a stroke which may be adjusted by varying the length of the crank, that is to say, the location of the crank pin 22 from the axis of the disc 24. The

means for adjusting the crank pin and for fixing it in the groove 23 are not shown but based on normal mechanical principles.

An important feature of the warping device according to the invention is. the operative connection of the slide head-members 5 and 6 with the warp beam. 7. For this purpose the head members 5 and-6 comprise a casing 36 of triangular shape with slide bearings movable on the cross members 3 and 4 designed to provide a precise horizontal displacement of the head members 5 and 6. The displacement of these head members is efiected by means of pneumatic cylinder piston devices 37 operating parallel to the axis of the warp beam. A V-belt drive 38 is provided within the casing 36 between a pulley 39 and a pulley-40. The pulley 40 is secured to a drive plate 41 adapted to press co-axially against the warp beam 7 by means of an intermediate disc 42. The pulley 39 is secured to a cross shaft 43 which includes a longitudinal keyway which cooperates with a corresponding drive key on the pulley 39 to effect rotation of. the pulley independently of the longitudinal positioning of the head 5 on the shaft 3 and of the pulley 39 on the shaft 43. The pulley 40 is carried by a shaft which is rigidly mounted in the head 5 and is designed to support the whole weight of the warp beam 7 when fully loaded with yarn. The slide head member 6 at the other side of the warping device is arranged in the same way as the head member. 5.

, The shaft 43 carrying the pulleys 39 at each end is driven by a V-beltdrive 47 engaging pulleys 45 and 46. The pulley 46 is secured on a shaft 48 driven by a motor 49 through a change speed gear 50 of any suitable mechanical or hydraulic type. It could be for example a hydraulic torque converter or an electromagnetic clutch.

By means of the-drive system described, the motor 49 drives the plates41 at a suitable speed independently of the position of the slide head members 5 and 6 in the warping device.

tively to the plates 41 during the drive or retardation of the The warp beam 7 comprises flanges8 and 9. Extemally of these flanges drum portions 53 are provided which serve to damp orbrake thewarp beam when installed in a loom or other machine. The drum portions 53 comprise drive apertures 54 and 55 on the outwardly directed face which are end portions 57.-The spindles56are arranged to enter a central aperture 58 in each of the plates 41. The aperture 58 has a widened conical entry portion 59 to co-operate with the tapered end portion 57 of the spindle 56. The plate 41 further comprises a brake lining 60,similar to a motor vehicle brake lining,which is mounted on the side face of the plate 41.

, beyond the plate 42 and is adapted to enter the aperture 58 with the side face of the disc opposite to {that comprising the pegs, pins or the like in a position for engagement with the brakelining 60 of the plate 41.

Two inclined ramps 51 and 52 at ground level and located v at a distance corresponding to the spacing of the flanges 8 and 9"enable the warp beam to be lifted to a level slightly below the winding position by rolling the warp beam up to the warping device so that theflanges engage and run up the ramps 51 and 52. For this purpose the height of the ramp is selected so that the spindle 55 comes to a point vertically adjacent the apertures-58 but slightly offset downwardly relatively to them sothat when the slide head members 5 and 6 are moved one towards theother under the effect of the cylinder piston devices 37 the tapered member 57 can enter the conical entry part 59 and in doing so produce a slight lifting of the warp beam as it is brought to its correct position between the slide head members 5 and 6. The pneumatic cylinder piston devices located diametrally opposite projecting spindles 56 at the ends of the warp beam. The spindles 56 are terminated by tapered The slide head members 5 and 6 further comprise internally of the pulleys 40 pneumatic brakes, not shown, which are arranged to stop the rotary movement of the warp beam rapidly.

It will be seen that all the controls of the warping device are pneumatic thereby eliminating the danger of oil spotting which'may sometimes occur when hydraulic-devices are used with resulting difficulties and losses in weaving. An advantage of the use of pneumaticcontrols is moreover that they can be brought into action rapidly. j I

Another advantage of. the warping device according to the invention is the possibility of rapid adjustment for different tym of warp beam. For this purpose it is sufficient to change the ramps 51 and 52 and to adopt other suitable disc members such as 41 and 42. The absenceof any toothed gearing in this warping device and the replacement by V belts reduces the cost of production since V-belt. drives 1 are cheaper than toothed gearing and there is a consequent reduction in noise.

rectilinear and almost uniform reciprocating motion-ensures an equally uniform distribution of the yarns on the warp beam. While 1 have disclosed several embodiments of the present invention, it is to be understood that these embodiments are given by example only and not in a limiting sense.

What I claim is: i 1 1. A textile warping device for directly winding warps beams, comprising I a a warp beam for winding a textile warp, head members supporting the oppositeends of said warp parallel to the axis of said warp beam, at least one driving motor for rotating said warp beam around its own axis, 1

pneumatic actuating means for sliding said head members flexible transmission means connecting said driving motor with said warp beam, a presser roller extending parallel to said warp beam, pneumatic actuating means for moving said presser roller towards and away from the yarns wound on said warpv beam, perpendicularly to said warp beam, and for bringing it into contact with said yarns during the. winding thereof,

a reed for guiding the yarns of the textile warp before the winding thereof,

pneumatic actuating means for displacing said reed, and

at least one pneumatic brake for braking said warp beam.

2. The warping device, as set forth in claim 1, wherein said flexible transmission means connecting said driving I motor with said warp beamcomprises belt drive means located within said head members. 3. The warping device as set forth inclairn 1 wherein said flexible transmission means comprises means for censaid pneumatic actuating means for moving said presser roller comprises an intermediate cylinder piston device moving said presser roller out of engagement with the yarns wound on said warp beam during braking of said warp beam.

5. The warping device as set forth in claim 4 wherein the reed is operated by a crank pin and connecting rod system in which the eccentricity of said crank pin is adjustable to vary the reed stroke, and

a reciprocatory movement is imparted to said crank pin by means of a pneumatic cylinder piston device controlled by a valve operated by control members at the limits of the movement of said crank pin which thus reverses the movement at the end of each movement stroke.

6. The warping device as set forth in claim 8, in which said crank pin is adjustably mounted in a radial groove in a disc connected to said cylinder piston device,

said crank pin being adapted to be fixed in said groove after adjustment and said disc having projecting arms carrying adjuster screws engageable with operating members at the end of the movement stroke to effect reversal of a control valve supplying the cylinder piston device.

7. The warping device as set forth in claim 1 wherein said pneumatic actuating means for displacing said reed comprises a cylinder piston device reciprocating said reed, and

means for adjusting the amplitude of the stroke movement of said reed 8. The warping device as set forth in claim 7 in which intermediate discs are provided interposed between the driving discs and the end faces of said warp beam,

said intermediate discs comprising pegs adapted to enter apertures in the ends of said warp beam,

a central aperture which is traversed by the spindle on the end of said warp beam and the face of said intermediate discs opposite to that carrying the pegs is adapted to engage a friction lining on the driving disc.

9. The warping device as set forth in claim 1 further comprising means for lifting the warp beam into a nearly center position relatively to said head members,

said means comprising inclined ramps for engagement by flanges of said warp beam, and

said warp beam further comprising projecting spindles having tapered ends adapted to enter apertures in driving disc members associated with said head members and arranged so that the approach movement of two head members at each end of said warp beam efi'ects engagement with the tapered spindle ends thereby to lift said warp beam clear of the ramps. 

1. A textile warping device for directly winding warps beams, comprising a warp beam for winding a textile warp, head members supporting the opposite ends of said warp beam, pneumatic actuating means for sliding said head members parallel to the axis of said warp beam, at least one driving motor for rotating said warp beam around its own axis, flexible transmission means connecting said driving motor with said warp beam, a presser roller extending parallel to said warp beam, pneumatic actuating means for moving said presser roller towards and away from the yarns wound on said warp beam, perpendicularly to said warp beam, and for bringing it into contact with said yarns during the winding thereof, a reed for guiding the yarns of the textile warp before the winding thereof, pneumatic actuating means for displacing said reed, and at least one pneumatic brake for braking said warp beam.
 2. The warping device, as set forth in claim 1, wherein said flexible transmission means connecting said driving motor with said warp beam comprises belt drive means located within said head members.
 3. The warping device , as set forth in claim 1 , wherein said flexible transmission means comprises means for centering said warp beam, a friction disc enganging an intermediate disc rotating in unison with said warp beam, and means for exerting axial pressure on said warp beam to cause engagement of the friction disc with said warp beam for effecting drive and braking of said warp beam from said head members.
 4. The warping device as set froth in claim 3, wherein said pneumatic actuating means for moving said presser roller comprises an intermediate cylinder piston device moving said presser roller out of engagement with the yarns wound on said warp beam during braking of said warp beam.
 5. The warping device , as set forth in claim 4 , wherein the reed is operated by a crank pin and connecting rod system in which the eccentricity of said crank pin is adjustable to vary the reed stroke, and a reciprocatory movement is imparted to said crank pin by means of a pneumatic cylinder piston device controlled by a valve operated by control members at the limits of the movement of said crank pin which thus reverses the movement at the end of each movement stroke.
 6. The warping device , as set forth in claim 8, in which said crank pin is adjustably mounted in a radial groove in a disc connected to said cylinder piston device, said crank pin being adapted to be fixed in said groove after adjustment and said disc having projecting arms carrying adjuster screws engageable with operating members at the end of the movement stroke to effect reversal of a control valve supplying the cylinder piston device.
 7. The warping device , as set forth in claim 1 wherein said pneumatic actuating means for displacing said reed comprises a cylinder piston device reciprocating said reed, and means for adjusting the amplitude of the stroke movement of said reed .
 8. The warping device , as set forth in claim 7 , in which intermediate discs are provided interposed between the driving discs and the end faces of said warp beam, said intermediate discs comprising pegs adapted to enter apertures in the ends of said warp beam, a central aperture which is traversed by the spindle on the end of said warp beam , and the face of said intermediate discs opposite to that carrying the pegs is adapted to engage a friction lining on the driving disc.
 9. The warping device , as set forth in claim 1 further comprising means for lifting the warp beam into a nearly center position relatively to said head members, said means comprising inclined ramps for engagement by flanges of said warp beam, and said warp beam further comprising projecting spindles having tapered ends aDapted to enter apertures in driving disc members associated with said head members and arranged so that the approach movement of two head members at each end of said warp beam effects engagement with the tapered spindle ends thereby to lift said warp beam clear of the ramps. 